<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>360seesee</title>
  <style>
    .bigblock {
      width: 710px;
      height: 288px;
    }
    .bigblock div {
      float: left;
      margin: 1px
      
    }
    .one {
      background-image: url('1.jpg');
      width: 279px;
      height: 282px
    }
    .two {
      background-image: url('2.jpg');
      width: 140px;
      height: 140px
    }
    .three {
      background-image: url('3.jpg');
      width: 282px;
      height: 140px;
    }
    .four {
      background-image: url('4.jpg');
      width: 280px;
      height: 140px;
    }
    .five {
      background-image: url('5.jpg');
      width: 140px;
      height: 140px;
    }
  </style>
</head>
<body>
  <div class="bigblock">
    <div class="one"></div>
    <div class="two"></div>
    <div class="three"></div>
    <div class="four"></div>
    <div class="five"></div>
  </div>
</body>
</html>